Seems I asked a popular question....I'm running the 6.8.25 on my Mini Maxx, with the HD Boost 175 tune.

I like it!
Chris

 

Thanks for the info.

 

Chris I had to send mine back to H&S for warranty. I got them to throw in the custom tune. Here the list.
http://www.hsperformance.com/black-m...-6-7l-cummins/

EFI will be sweet, as good as H&S is, there isn't that many options/adjustments as EFI.

I feel your transmission pain, if I knew more I would have bought a G56 truck, but then I would have twins and my larger nozzles installed by now. Don't get me wrong the RFE68 is an awesome transmission, just doesn't have the holding power it needs. I think you could easily get to around 700-800rwhp very easy with the stock engine/stock CP

 

Is it the 6.8.24?

Chris

 

Blake,
Sorry its been so long since I have chimed in but I am out on deployment and all my fun is gone for now. BOY wait till you see the pics of what I got stashed in the garage waiting on me when I get home!!

Which tune you running? I have all the tunes saved since the day I bought my H&S so if you want a specific one PM me and I will email it.

I am glad you went with the 5", I think mine sounds perfect.

I will keep in touch but wanted to say ENJOY

 

Chris, H&S needa less AFC and have change the gov springs to 4000k

I tried to get a verison number. I never like the enhanced turbine housing programer. Drive pressure and egt's was to high on mild mode for me. The truck really needs a larger turbo to wake the 6.7L up decently.

 

1st fill up with it deleted. Average was 12.5 stock.

Today, 14.5. Hand calculated. This was 90% in town milage. And trust me, I was by no means easy on it either. Spent a lot of time playing.

The lie-o-meter was showing 15. Not too far off IMO.

Took a 40 mile run a bit ago on some errands. Mostly highway miles. Taking it easy running 55-60mph.

Lie-o-meter was showing a whopping 19.7. If its even close Ill be ecstatic.

I always said if I get 17 outta this beast Ill be happy. Looks like I may.

 

I know a guy that just got 23.6 on a Mega. I did a bunch of mods for him and a few tricks. Most of it was air mods. And that's no BS mileage. They have the potential.

He's got 9000 miles on his

 

Blake, my lie-o-meter is consistently high by .5mpg....like dead nuts .5mpg high, so you should be a solid 19mpg highway...

Chris

 

Guess that disputes that "RUMOR" that programmers dont give any better fuel economy....

 

You get better fuel mileage on mild than stock mode 1-2mpg increase just by running mild. My evic comes fairly close to my hand calculations.

 

I gota say I still don't believe it !!! LOL

 

We gonna start this again?

 

I don't believe the 23.6 on a mega, unless all downhill..

Marc

 

Start tracking it using this:
www.fuelly.com
You can do it right from your phone and it's pretty handy. Here's mine (stock - egr)..